Thursday in photos

Athletes wait for the baton handover as they compete in a men's 4x400-meter relay heat at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Thursday, Aug. 15, 2013. (AP Photo/Martin Meissner)Photo by Martin Meissner

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Amanda Knox and her family celebrate acquittalItaly's highest court overturned the murder conviction against Amanda Knox and her ex-boyfriend Friday over the 2007 slaying of Knox's roommate, bringing to a definitive end to the high-profile case.